Heat recovery cascade drying tower

Abstract

The invention discloses a heat recovery cascade drying tower, and particularly relates to the technical field of drying towers, the heat recovery cascade drying tower comprises a tower shell, a displacement electric cylinder and a honeycomb internal and external displacement heat exchange mechanism; wherein the honeycomb inside and outside displacement heat exchange mechanism comprises a connecting strip, a rack, two gears, a displacement rotating shaft, an L-shaped strip, a honeycomb heat exchange sheet, a honeycomb inner column, a flow guide frame and a plurality of honeycomb outer holes. Through the honeycomb internal and external displacement heat exchange mechanism, the heat recovery cascade drying tower has the advantages that internal honeycomb multi-surface displacement heat exchange contact drying of materials can be achieved, external honeycomb multi-surface displacement heat exchange contact of the materials can be achieved, the displacement heat exchange contact area is wider, and the heat exchange drying effect of the heat recovery cascade drying tower is better; therefore, the problems that in the heat exchange process, outer-layer honeycomb displacement contact drying is difficult to achieve, inner-layer honeycomb displacement contact drying is difficult to achieve synchronously, the drying displacement contact area is small, and the drying effect of the heat recovery cascade type drying tower is poor are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of drying towers, and more specifically, to a heat recovery cascade drying tower. Background Art

[0002] The heat recovery cascade drying tower is a highly efficient drying equipment, which is mainly used to dry materials. The heat recovery cascade drying tower adopts the heat energy transfer method to transfer heat energy to the surface of the material through the heat medium, so that the water evaporates and achieves the drying effect.

[0003] Among the existing published technical documents, the Chinese patent announcement number CN106643024A discloses a drying tower, which is provided with a conical mesh material tray in the tower body above the widened part. When in use, the cylinder piston pushes the material tray downward, so that the bottom surface of the material tray is located in the widened part, and the hot air reaches the top of the material tray through the mesh to pre-dry the material above it, and then the material slides from the gap between the material tray and the widened part for formal drying, which further improves the drying efficiency. However, the patent has the following defects: When the heat recovery cascade drying tower is used for drying, the material will enter the tower body and be filled with heated air so that the air and the material are in contact to achieve the drying operation. The steam after drying is discharged upward to recover heat and achieve energy saving. However, during the drying process, the material will directly contact and exchange heat with the inside of the drying tower. During the heat exchange process, it is difficult to achieve the outer layer honeycomb displacement contact drying, and it is difficult to achieve the inner layer honeycomb displacement contact drying simultaneously, resulting in a small drying displacement contact area and a poor drying effect of the heat recovery cascade drying tower. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides the following technical solutions: a heat recovery cascade drying tower, comprising a tower shell and a position-shifting electric cylinder, the position-shifting electric cylinder is fixed at the top of the tower shell, and the pushing end of the position-shifting electric cylinder is provided with a honeycomb internal and external position-shifting heat exchange mechanism; the honeycomb internal and external position-shifting heat exchange mechanism comprises a connecting bar fixedly installed at the pushing end of the position-shifting electric cylinder, both ends of the connecting bar are fixedly connected with racks, and one side of each of the racks is meshingly connected with two gears; a position-shifting shaft is fixedly connected to the inner wall of the gear, and the position-shifting shaft is rotatably connected to the tower shell, an L-shaped bar is fixedly connected to one side of the outer wall of the position-shifting shaft, and a honeycomb heat exchange plate is fixedly installed at the bottom end of the L-shaped bar, a honeycomb inner column is rotatably installed inside the honeycomb heat exchange plate, and a guide frame is fixedly connected to one side of the inner wall of the tower shell, and a plurality of honeycomb outer holes are opened inside the guide frame.

[0005] Preferably, the two racks are symmetrically arranged about the connecting bar, and the cross-sectional shape of the rack is L-shaped. A gap is provided between the outer wall of the honeycomb inner column and the inner wall of the honeycomb heat exchange plate, and the inner wall of the guide frame is a smooth surface. A guide block is fixedly installed on the top of the guide frame; an angle sensor is installed on the top of one of the displacement shafts, the sensing end of the angle sensor is fixedly connected to the displacement shaft, and a support bar is fixedly connected to one side of the outer wall of the angle sensor; the support bar is fixedly installed to the tower shell. A fixing frame is fixedly installed on one side of the tower shell, and a discharge hopper is fixedly connected to the bottom end of the tower shell, and the fixing frame is used to support the tower shell. A plurality of honeycomb heat exchange rings are fixedly connected to the outer wall of the honeycomb heat exchange plate, and the honeycomb heat exchange rings are rotatably connected to the guide frame.

[0006] A feed pipe is provided on one side of the displacement electric cylinder, and a heat recovery pipe is provided on one side of the feed pipe; the feed pipe and the heat recovery pipe are both fixedly connected to the tower shell; a support frame is fixedly connected to the bottom end of the honeycomb inner column, and the support frame is fixedly connected to the guide frame, and the honeycomb heat exchange plate is rotatably connected to the support frame.

[0007] When this technology is used, the displacement electric cylinder pushes the connecting bar to move left, and the connecting bar drives the rack to move left and then right. The gear drives the displacement shaft to rotate back and forth, and the L-shaped bar drives the honeycomb heat exchange plate to rotate back and forth. Multiple honeycomb heat exchange rings achieve oblique rotational contact with the material, and the inner wall of the honeycomb heat exchange plate can achieve reciprocating rotation outside the honeycomb inner column, so that the material in the honeycomb gap outside the honeycomb heat exchange plate can achieve reciprocating displacement contact, and the material in the honeycomb gap inside the honeycomb heat exchange plate can achieve reciprocating displacement contact, the material can achieve internal honeycomb multi-faceted displacement heat exchange contact drying, and the material can achieve external honeycomb multi-faceted displacement heat exchange contact.

[0008] Preferably, a main heat supply pipe is fixedly connected to one side of the inner wall of the guide frame and located below the guide frame, and a flow-dividing heat exchange component is provided below the main heat supply pipe; the flow-dividing heat exchange component comprises a flow-dividing cone fixedly arranged below the main heat supply pipe, the bottom end of the flow-dividing cone is fixedly connected to a pillar, a plurality of flow-dividing sleeves are fixedly installed on the outer wall of the pillar, and the plurality of flow-dividing sleeves are fixedly connected to the tower shell; a connecting pipe is fixedly connected to one side of the outer wall of the main heat supply pipe, and an auxiliary heat supply pipe is fixedly connected to the top end of the connecting pipe; The split flow heat exchange assembly also includes a drying box, a resistance heating plate, a controller and a fan; the drying box is fixedly connected to the bottom end of the main heating pipe, the resistance heating plate is fixed to the bottom end of the drying box, the controller is fixed to one side of the resistance heating plate, and the fan is fixedly connected to one side of the drying box. The outer wall of the split flow cone is a smooth surface, and the support is used to support the guide sleeve. The auxiliary heating pipe is fixedly connected to the tower shell, and the auxiliary heating pipe is connected to the tower shell, and the inner walls of the auxiliary heating pipe and the connecting pipe are both smooth surfaces.

[0009] When this technology is in use, the controller starts the fan, which allows external pressurized wind to enter the drying box. The heated air is pressurized and transported to the main heating pipe, which is then sprayed onto the diverter cone. The main heating pipe transports another part of the hot air to the connecting pipe. More heated air is transported to the multiple honeycomb outer holes inside the guide frame. The dried material is diverted along the diverter cone to multiple guide sleeves, and then discharged into the discharge hopper along the guide sleeve.

[0010] Technical effects and advantages of the present invention: 1. The present invention uses a honeycomb internal and external displacement heat exchange mechanism. The displacement electric cylinder pushes the connecting bar to move left, and the connecting bar drives the rack to move left and then right. The rack drives the gear to rotate back and forth. The honeycomb heat exchange plate drives multiple honeycomb heat exchange rings to rotate back and forth inside the honeycomb outer hole. The material in the honeycomb gap outside the honeycomb heat exchange plate can achieve reciprocating displacement, and the material in the honeycomb gap inside the honeycomb heat exchange plate can achieve reciprocating displacement. At the same time, the steam heat will also be recovered through the heat recovery pipe. The material can achieve multi-faceted displacement heat exchange contact drying inside the internal honeycomb, and the material can achieve multi-faceted displacement heat exchange contact outside the external honeycomb. The displacement heat exchange contact area is wider, and the heat exchange and drying effect of the heat recovery cascade drying tower is better.

[0011] 2. The present invention utilizes a diversion heat exchange component, which is sprayed from the main heating pipe onto the diversion cone. The diversion cone diverts the hot air for upward discharge. The main heating pipe transports the hot air to the connecting pipe, and enters the auxiliary heating pipe through the connecting pipe. There is a lot of heated air in the multiple honeycomb outer holes inside the guide frame. The dried material is diverted along the diversion cone to multiple guide sleeves, so that honeycomb diversion heating and drying can be achieved, and the heat exchange and drying effect of the drying tower is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the main structure of the heat recovery cascade drying tower of the present invention.

[0013] Figure 2 It is a schematic diagram of the cross-sectional structure of the heat recovery cascade drying tower of the present invention.

[0014] Figure 3 It is a schematic diagram of the partial structure of the cross section of the connection between the feed pipe and the tower shell of the present invention.

[0015] Figure 4 It is a schematic diagram of the vertical cross-section structure of the heat recovery cascade drying tower of the present invention.

[0016] Figure 5 It is a schematic diagram of the local structure of the vertical section of the connection between the guide block and the guide frame of the present invention.

[0017] Figure 6It is a schematic diagram of the local structure of the vertical section of the connection between the tower shell and the guide frame of the present invention when viewed from above.

[0018] Figure 7 It is a schematic diagram of the local structure of the vertical section of the connection between the honeycomb outer hole and the honeycomb heat exchange ring of the present invention.

[0019] Figure 8 It is a schematic diagram of the local structure of the vertical section of the connection between the honeycomb inner column and the support frame of the present invention.

[0020] Fig. 9 It is a schematic diagram of the partial structure of the split flow heat exchange component of the present invention when viewed from above in vertical section.

[0021] The accompanying drawings are marked as follows: 1. tower shell; 2. displacement electric cylinder; 3. connecting bar; 4. rack; 5. gear; 6. displacement shaft; 7. L-shaped bar; 8. honeycomb heat exchange plate; 9. honeycomb inner column; 10. guide frame; 11. honeycomb outer hole; 12. guide block; 13. angle sensor; 14. support bar; 15. fixing frame; 16. discharge hopper; 17. honeycomb heat exchange ring; 18. support frame; 19. main heating pipe; 20. diverter cone; 21. pillar; 22. guide sleeve; 23. auxiliary heating pipe; 24. connecting pipe; 25. drying box; 26. resistance heating plate; 27. controller; 28. fan; 29. ​​feed pipe; 30. heat recovery pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] As attached Figure 1 - Attachment Fig. 9 A heat recovery cascade drying tower is shown, and a honeycomb internal and external position-changing heat exchange mechanism is arranged on the heat recovery cascade drying tower. The arrangement of the honeycomb internal and external position-changing heat exchange mechanism enables the material to achieve multi-surface position-changing heat exchange contact drying of the internal honeycomb, and the material can achieve multi-surface position-changing heat exchange contact of the external honeycomb. The position-changing heat exchange contact area is wider, and the heat exchange and drying effect of the heat recovery cascade drying tower is better. The specific structural arrangement of the honeycomb internal and external position-changing heat exchange mechanism is as follows.

[0024] In this technical solution, as shown in the attached Figure 1 - Attachment Figure 8As shown, it includes a tower shell 1 and a position-shifting electric cylinder 2, the position-shifting electric cylinder 2 is fixed at the top of the tower shell 1, and the pushing end of the position-shifting electric cylinder 2 is provided with a honeycomb inside-outside position-shifting heat exchange mechanism; the honeycomb inside-outside position-shifting heat exchange mechanism includes a connecting bar 3 fixedly installed at the pushing end of the position-shifting electric cylinder 2, both ends of the connecting bar 3 are fixedly connected with racks 4, and one side of each rack 4 is meshingly connected with two gears 5.

[0025] The inner wall of the gear 5 is fixedly connected with a displacement shaft 6, which is rotationally connected to the tower shell 1. An L-shaped bar 7 is fixedly connected to one side of the outer wall of the displacement shaft 6. A honeycomb heat exchange plate 8 is fixedly installed at the bottom end of the L-shaped bar 7. A honeycomb inner column 9 is rotationally installed inside the honeycomb heat exchange plate 8. A guide frame 10 is fixedly connected to one side of the inner wall of the tower shell 1. A plurality of honeycomb outer holes 11 are opened inside the guide frame 10. Two racks 4 are symmetrically arranged about the connecting bar 3, and the cross-sectional shape of the racks 4 is L-shaped. A gap is provided between the outer wall of the honeycomb inner column 9 and the inner wall of the honeycomb heat exchange plate 8, and the inner wall of the guide frame 10 is a smooth surface.

[0026] In this technical solution, as shown in the attached Figure 1 - Attachment Figure 5 As shown, a guide block 12 is fixedly installed on the top of the guide frame 10, so that the material can be diverted to the external honeycomb gap formed between the multiple honeycomb outer holes 11 and the honeycomb heat exchange plate 8 through the guide block 12. An angle sensor 13 is installed on the top of one of the displacement shafts 6, and the sensing end of the angle sensor 13 is fixedly connected to the displacement shaft 6. A support bar 14 is fixedly connected to one side of the outer wall of the angle sensor 13; the support bar 14 is fixedly installed between the tower shell 1, so that the angle sensor 13 is supported by the support bar 14, and the angle sensor 13 performs angle sensing on the displacement shaft 6, and the rotation angle of the sensing displacement shaft 6 is within the range of 45 degrees, so as to realize the reciprocating rotation function. A fixed frame 15 is fixedly installed on one side of the tower shell 1, and a discharge hopper 16 is fixedly connected to the bottom end of the tower shell 1. The fixed frame 15 is used to support the tower shell 1, so that the tower shell 1 can be supported on the side by the fixed frame 15 to increase the stability of the tower shell 1 and prevent the tower shell 1 from shaking, while the discharge hopper 16 performs the function of discharging materials downward.

[0027] In this technical solution, as shown in the attached Figure 3 - Attachment Figure 8As shown, the outer wall of the honeycomb heat exchange plate 8 is fixedly connected with a plurality of honeycomb heat exchange rings 17, and the honeycomb heat exchange rings 17 are rotatably connected with the guide frame 10, so that the honeycomb heat exchange plate 8 drives the plurality of honeycomb heat exchange rings 17 to reciprocate inside the honeycomb outer hole 11, thereby realizing multi-faceted displacement heat exchange contact. A feed pipe 29 is provided on one side of the displacement electric cylinder 2, and a heat recovery pipe 30 is provided on one side of the feed pipe 29; the feed pipe 29 and the heat recovery pipe 30 are both fixedly connected with the tower shell 1, so that the material can enter the tower shell 1 through the feed pipe 29, and the heat recovery pipe 30 can be docked on the heat recovery steam pipeline. The bottom end of the honeycomb inner column 9 is fixedly connected with a support frame 18, and the support frame 18 is fixedly connected with the guide frame 10, and the honeycomb heat exchange plate 8 is rotatably connected with the support frame 18, so that the guide frame 10 supports the support frame 18, and the support frame 18 can support a plurality of honeycomb inner columns 9, thereby increasing the stability of the honeycomb inner columns 9.

[0028] In this technical solution, as shown in the attached Figure 8 - Attachment Fig. 9 As shown, a main heat supply pipe 19 is fixedly connected to one side of the inner wall of the guide frame 10 and located below the guide frame 10, and a shunt heat exchange component is provided below the main heat supply pipe 19; the shunt heat exchange component includes a shunt cone 20 fixedly arranged below the main heat supply pipe 19, the bottom end of the shunt cone 20 is fixedly connected to a support 21, and a plurality of guide sleeves 22 are fixedly installed on the outer wall of the support 21, and the plurality of guide sleeves 22 are fixedly connected to the tower shell 1; a connecting pipe 24 is fixedly connected to one side of the outer wall of the main heat supply pipe 19, and an auxiliary heat supply pipe 23 is fixedly connected to the top of the connecting pipe 24; the shunt heat exchange component also includes a drying box 25, a resistance heating plate 26, a controller 27 and a fan 28.

[0029] The drying box 25 is fixedly connected to the bottom end of the main heating pipe 19, the resistance heating plate 26 is fixed to the bottom end of the drying box 25, the controller 27 is fixed to one side of the resistance heating plate 26, and the fan 28 is fixedly connected to one side of the drying box 25. The outer wall of the diverter cone 20 is a smooth surface, and the support 21 is used to support the guide sleeve 22.

[0030] The auxiliary heating pipe 23 is fixedly connected to the tower shell 1 , and the auxiliary heating pipe 23 is communicated with the tower shell 1 . The inner walls of the auxiliary heating pipe 23 and the connecting pipe 24 are both smooth surfaces.

[0031] The working principle of the heat recovery cascade drying tower of the present invention is as follows: First, when the present invention is installed and supported, the tower shell 1 is supported by the fixing frame 15 to increase the stability of the tower shell 1, and the feed pipe 29 is docked on the material conveying pipeline, and the heat recovery pipe 30 can be docked on the heat recovery steam pipeline.

[0032] Secondly, when the present invention performs split flow heat exchange, the controller 27 turns on the resistance heating plate 26, and the controller 27 starts the fan 28 at the same time, and the fan 28 allows the external pressurized wind to enter the drying box 25, and the air inside the drying box 25 is heated by the resistance heating plate 26. The heated air is pressurized and transported to the main heating pipe 19, and sprayed onto the diverter cone 20 by the main heating pipe 19, and the diverter cone 20 diverts the hot air for upper discharge. At the same time, the main heating pipe 19 transports another part of the hot air to the connecting pipe 24, and enters the auxiliary heating pipe 23 through the connecting pipe 24, and is transported to the inside of the tower shell 1 by the auxiliary heating pipe 23, and more heated air is transported to the multiple honeycomb outer holes 11 inside the guide frame 10.

[0033] Then, when the present invention performs the internal and external displacement heat exchange of the honeycomb, the material enters the tower shell 1 through the feed pipe 29, and the material is diverted through the guide block 12 to the external honeycomb gap formed between the honeycomb outer hole 11 and the honeycomb heat exchange plate 8, and the material is also guided through the honeycomb inner column 9 to enter the internal honeycomb gap formed between the honeycomb inner column 9 and the honeycomb heat exchange plate 8. At the same time, the controller 27 starts the displacement electric cylinder 2, and the displacement electric cylinder 2 pushes the connecting bar 3 to move left, and the connecting bar 3 drives the rack 4 to move left and then right.

[0034] The rack 4 drives the gear 5 to rotate back and forth, the gear 5 drives the displacement shaft 6 to rotate back and forth, the displacement shaft 6 drives the L-shaped bar 7 to rotate back and forth, the L-shaped bar 7 drives the honeycomb heat exchange plate 8 to rotate back and forth, and the honeycomb heat exchange plate 8 drives multiple honeycomb heat exchange rings 17 to rotate back and forth inside the honeycomb outer hole 11. Multiple honeycomb heat exchange rings 17 realize oblique rotation contact with the material, and the inner wall of the honeycomb heat exchange plate 8 can realize reciprocating rotation outside the honeycomb inner column 9, so that the material in the honeycomb gap outside the honeycomb heat exchange plate 8 can realize reciprocating displacement contact, and the material in the honeycomb gap inside the honeycomb heat exchange plate 8 can realize reciprocating displacement contact, and the guide frame 10 supports the support frame 18, the support frame 18 can support multiple honeycomb inner columns 9, the honeycomb heat exchange plate 8 reciprocates on the support frame 18, and the angle sensor 13 is supported by the support bar 14. The angle sensor 13 performs angle sensing on the displacement shaft 6, and the rotation angle of the sensing displacement shaft 6 is within the range of 45 degrees to realize the reciprocating rotation function. In this way, the material can achieve internal honeycomb multi-surface displacement heat exchange contact drying, and the material can achieve external honeycomb multi-surface displacement heat exchange contact.

[0035] Finally, when the present invention performs heat exchange recovery and discharge, the dried material is diverted along the diversion cone 20 to multiple guide sleeves 22, and discharged along the guide sleeve 22 to the discharge hopper 16, and the material is discharged from the discharge hopper 16. At the same time, the steam is discharged into the recovery channel along the heat recovery pipe 30, and the recovered heat is used for heating other equipment.

[0036] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat recovery cascade drying tower, comprising a tower shell (1) and a position-changing electric cylinder (2), wherein the position-changing electric cylinder (2) is fixed on the top of the tower shell (1), characterized in that: The pushing end of the position-changing electric cylinder (2) is provided with a honeycomb internal and external position-changing heat exchange mechanism; The honeycomb internal and external displacement heat exchange mechanism comprises a connecting bar (3) fixedly mounted on the pushing end of the displacement electric cylinder (2), both ends of the connecting bar (3) being fixedly connected to racks (4), and one side of each rack (4) being meshingly connected to two gears (5); The inner wall of the gear (5) is fixedly connected to a displacement shaft (6), the displacement shaft (6) is rotationally connected to the tower shell (1), one side of the outer wall of the displacement shaft (6) is fixedly connected to an L-shaped bar (7), a honeycomb heat exchange plate (8) is fixedly installed at the bottom end of the L-shaped bar (7), a honeycomb inner column (9) is rotatably installed inside the honeycomb heat exchange plate (8), and a guide frame (10) is fixedly connected to the inner wall of the tower shell (1), and a plurality of honeycomb outer holes (11) are opened inside the guide frame (10).

2. The heat recovery cascade drying tower according to claim 1, characterized in that: The two racks (4) are symmetrically arranged with respect to the connecting bar (3), and the cross-sectional shape of the racks (4) is L-shaped.

3. The heat recovery cascade drying tower according to claim 1, characterized in that: A gap is provided between the outer wall of the honeycomb inner column (9) and the inner wall of the honeycomb heat exchange plate (8), and the inner wall of the flow guide frame (10) is a smooth surface.

4. The heat recovery cascade drying tower according to claim 1, characterized in that: A guide block (12) is fixedly mounted on the top of the guide frame (10); An angle sensor (13) is installed at the top end of one of the displacement shafts (6), a sensing end of the angle sensor (13) is fixedly connected to the displacement shaft (6), and a support bar (14) is fixedly connected to one side of the outer wall of the angle sensor (13); The support bar (14) is fixedly mounted on the tower shell (1).

5. The heat recovery cascade drying tower according to claim 1, characterized in that: A fixing frame (15) is fixedly mounted on one side of the tower shell (1), and a discharge hopper (16) is fixedly connected to the bottom end of the tower shell (1), wherein the fixing frame (15) is used to support the tower shell (1).

6. The heat recovery cascade drying tower according to claim 1, characterized in that: A plurality of honeycomb heat exchange rings (17) are fixedly connected to the outer wall of the honeycomb heat exchange plate (8), and the honeycomb heat exchange rings (17) are rotatably connected to the guide frame (10).

7. The heat recovery cascade drying tower according to claim 1, characterized in that: A feed pipe (29) is provided on one side of the position-changing electric cylinder (2), and a heat recovery pipe (30) is provided on one side of the feed pipe (29); The feed pipe (29) and the heat recovery pipe (30) are both fixedly connected to the tower shell (1); The bottom end of the honeycomb inner column (9) is fixedly connected to a support frame (18), the support frame (18) is fixedly connected to the flow guide frame (10), and the honeycomb heat exchange plate (8) is rotatably connected to the support frame (18).

8. The heat recovery cascade drying tower according to claim 1, characterized in that: A main heat supply pipe (19) is fixedly connected to one side of the inner wall of the flow guide frame (10) and located below the flow guide frame (10), and a split flow heat exchange component is provided below the main heat supply pipe (19); The flow-dividing heat exchange assembly comprises a flow-dividing cone (20) fixedly arranged below the main heat supply pipe (19); the bottom end of the flow-dividing cone (20) is fixedly connected to a support (21); a plurality of flow-guiding sleeves (22) are fixedly mounted on the outer wall of the support (21); and the plurality of flow-guiding sleeves (22) are fixedly connected to the tower shell (1); A connecting pipe (24) is fixedly connected to one side of the outer wall of the main heating pipe (19), and an auxiliary heating pipe (23) is fixedly connected to the top of the connecting pipe (24); The split flow heat exchange assembly also includes a drying box (25), a resistance heating plate (26), a controller (27) and a fan (28); The drying box (25) is fixedly connected to the bottom end of the main heating pipe (19), the resistance heating plate (26) is fixed to the bottom end of the drying box (25), the controller (27) is fixed to one side of the resistance heating plate (26), and the fan (28) is fixedly connected to one side of the drying box (25).

9. The heat recovery cascade drying tower according to claim 8, characterized in that: The outer wall of the splitter cone (20) is a smooth surface, and the support column (21) is used to support the guide sleeve (22).

10. The heat recovery cascade drying tower according to claim 8, characterized in that: The auxiliary heating pipe (23) is fixedly connected to the tower shell (1), and the auxiliary heating pipe (23) is communicated with the tower shell (1), and the inner walls of the auxiliary heating pipe (23) and the connecting pipe (24) are both smooth surfaces.

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